TDD UL/DL Configuration Switching for Legacy UE Conflict Resolution
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Solution Overview
Problem
In LTE/TDD systems, the legacy UE faces conflicts and resource wastage due to the difference in UL/DL configurations, leading to inefficient scheduling and operations, as it cannot match fast-varying traffic characteristics and environments effectively.
Innovation Solution
A method for handling resource allocation in TDD systems involves transferring from a first UL/DL configuration to a second configuration in a frame, allowing triggered transmissions or receptions to occur in subsequent frames according to the original configuration, thereby avoiding conflicts and ensuring seamless operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UL/DL configuration is changed frequently to match fast-varying traffic characteristics, then system performance and resource utilization are improved, but legacy UEs experience conflicts and scheduling failures due to their inability to adapt quickly
Solution Approach 1:
The patent implements dynamic UL/DL configuration switching where the eNB can transition from a first UL/DL configuration to a second UL/DL configuration based on real-time traffic conditions. Advanced UEs are capable of adapting to these dynamic changes, while legacy UEs maintain operation on the original configuration, allowing the system to be flexible without breaking backward compatibility.
Solution Approach 2:
The patent segments the UE population into legacy UEs and advanced UEs with different capabilities. Legacy UEs continue to use the original UL/DL configuration for reliable operation, while advanced UEs can utilize the new configuration for optimized resource allocation. This segmentation allows the system to accommodate both groups without conflict.
2Productivity
If the UL/DL configuration is changed frequently, then resource allocation efficiency is improved, but legacy UEs lose scheduling opportunities and resource is wasted due to configuration conflicts
Solution Approach 1:
The patent applies local quality by allowing different UL/DL configurations to coexist for different UE groups. Advanced UEs receive resources according to the new UL/DL configuration where resources are efficiently allocated, while legacy UEs receive resources according to the original configuration where they can reliably operate. This local differentiation eliminates resource waste while maintaining efficiency.
3Stability of the object's composition
If the minimum periodicity of SIB1 transmission is large (e.g., 640 ms), then legacy UEs can maintain stable operation, but the UL/DL configuration cannot adapt to fast-varying traffic characteristics
Solution Approach 1:
The patent introduces dynamic configuration switching capability that operates independently of the SIB1 periodicity constraint. The eNB can switch between UL/DL configurations based on real-time traffic conditions, and advanced UEs can track these changes through dedicated signaling, bypassing the limitation of large SIB1 periodicity while maintaining stability for legacy UEs.
Data Source
AI summary
A method of handling resource allocation for a network of a wireless communication system comprises transferring from a first uplink (UL)/downlink (DL) configuration to a second UL/DL configuration in a first frame; and performing a triggered transmission or reception with a communication device of the wireless communication system in a subframe of a second frame according to the first UL/DL configuration.